Air heating and circulating fireplace



R. W. CLAYBAUGH ET AL Sept. 3, 1929.

AIR HEATING AND CIRGULATING FIREPLACE Filed Feb. 29

I ATTORNEY Patented Sept. 3, 1929.

UNITED STATES PATENT OFFICE.

RALPR W. CLAYBA UGH, PACIFIC GROVE, AND GEORGE D. PATRICK, OF MONTEREY, CALIFORNIA, ASSIGNORS F ONE-THIRD T0 VICTOR H. PATRICK, OF MONTEREY.

CALIFORNIA.

AIR HEATING AND tJIRCULATING FIREPLACE.

Application filed February 29, 1928. Serial No. 258,117.

This invention relates to air-heating-andcirculating fireplaces, the principal object of which is to provide a fireplace wherein, all

but a small percentage of the heat' generated in the firebox is applied to induce a circulation of heated air within certain air spaces and ducts, all in intercommunication with a related distributive system for the utilization of said heated product.

A further object is to provide as a new article of manufacture, a fireplace that may be installed intact ready for use in buildings already constructed.

Another ob ect is to provide certain interrelated air ducts adapted to absorb heat from a chimney and firebox back.

A still further object is to provide an air space around said firebox within a mantel, said space communicating with said ducts.

Another object is to provide certain perforate air passages for the ingress of cold air and egress of said heated product.

A further object is to provide a series of nested wall-ducts having crimped, folding, spacing and stiffening means adapted to absorb heat.

Another objectis to provide a manifold means interrelated with ingress elements and with a system of distribution for said prodnot.

A still further object is the provision of certain regulative damper means.

Another, is the provision of a hollow door having -perforate means for cold air intake and hot air egress. I

A further provision. comprises regulative means for raising and lowering said door.

Further provisions comprise bafiie element adapted to absorb heat.

Still further provisions are comprised in certain peculiar fastening means whereby the chimney element is united to the fireplacemantel element.

These objects areattained generally by the form, material and construction of the parts employed, together with other objects and advantages that will hereinafter appear.

In the drawings.

Figure 1 is a front elevation of our invention.

Fig. 2 is a sectional elevation on line I-I of Fig. 1.

Fig. 3 is a section on the line IIII of Fig. 1,-

Fig. 4 is a plan. I

Fig.6 is a section on the line III-III of Fig. 4.

Fig. 6 is a detail view of the elements composing Fig. 7. A

Fig. 7 shows a broken View of the elements of Fig. 6 united.

Fig. 8 is a broken view of an air duct element.

Like reference characters refer to like parts throughout the several views.

Referring in detail to the drawings, Figure 1 illustrates a fireplace according to our invention, having a conventional brick base .2,

the mantel front 3 and the ends thereof 3 and 3 with the mantel shelf 4. Spaced within said mantel and equidistantly from'the interior ofsaid front and ends is the firebox denoted 100 as a whole, which comprises the bottom 5, the respective ends 6 and 6" and the front 7. I

Both the mantel front 3 and the firebox front 7 are provided with coincident dooropenings the edges of which are beaded over at 9 and 9 suitably spaced apart so as to provide vertical guides for the door 8 to play up and down in. Said door is of double construction having the members 8 and 8 one behind the other. the lower front of member 8 being provided with the perforations 10 while the upper portion of said door is provided with the perforations 11 which allow air to ascend into the prismoidal space 12 that communicates at each end thereof with the spaces 13 and 14 existing between the outer ends 6 and 6* of the firebox 100 and the interior of the mantel. I I

The door 8 is provided adjacent the inner 7 upper corners with the lugs 15 and the flexible means 16 attached thereto which pass over the pulleys 17 and attach to the counter-balance weights 18 which constitute a means of mag 'ulating the height of said door for direct admittance ofair to said firebox through said door openings.

Underneath the hearth member 19 of the firebox 100 is the space 20 existing between the under surface of said hearth 1-9 and the upper surface of the'brick base 2 said space being guarded by the reticulated means 21 at the lower front of said mantel 3, it being un derstood that said mantel stands on the four feet 22, 23, 24; and 25 which rest on the brickwork 2.

The mantelends 3 and3 'arehothprovided with suitable perforate means 26-adapted to admit air to the space 20. The front of said mantel may have its flat surfacerel'ievedby a suitable embossed panel 9.5-27.

'The back of the fireplace I00 is bounded the flat plate 28 which issecured toxthee ba edge of the bearth'member 19 the lower end of said plate flush. with said hea'rth. there by continuing the space20 from the. front-and.

both sides backwardly underneath. the hearth 19 and up behind the plate v28. Fromthe level of said hearth the plate 28- rises up wardly for a suitable distance then inclined forwardly at an. approximate rising angle of 30 degrees, whence it is inclined backwardly at an approximate rising angle of 45 degrees, thereby forming the V- haped projection of said firebox which by co-operating with the opposing'para-llel surface of the V-shaped projection 30 restricts the flue area. The upper end of the plate 28 terminates in the folded groove-like member 31 adapted to sheath the bottom; of another sheet, to be described, and disposed verticallythereto. Disposed behind the sheet 28 and suitably spaced apart are the 'parallel'sheets 28 and 28", which sheets may obviously be increased ondiminishedinnumber, said sheets being provided with the spacing stiffening elements 32 preferablytformed by crimping or plaiting the stock togetheqin the manner shown in Figs. 3 and 8, so as to form a series of longitudinal ribs, the rounded ridges 33 of which are adapted to mate with the counterpart seams 34 of the opposing sheet,

said sheets having their ends level with that of sheet 28.

The hindmost sheet 36 does not communicate with the circulation system as do the others. All of the said sheets being provided with suitable flanges as 37 38 and 39 which are adapted to nest one within the other and within the mantel. ends 3 and 3* to which they are secured by the through bolts 39. The perforations 40 being provided to allow air to enter behind the sheet 36 are .PI'OVl to cool the wall 41.

The upper edges of the mantel ma either be left as a section of the stock,be cur ed over inwardly as shown at 42,- Fig..2 or provided with other suitable finish means.

The up er edges of the firebox however ded with trough-like elements 43 adapted to accommodate the complement member 43 as shown in the-complement units of Fig. 6 and as assembled-fin Fig. 7. a

The foregoing relates exclusively to the arts and elements comprised in invention approximately below the of Figs. 1 and 2, which may ormay not be constructed as a separate unit.

We will now describe the chimney-and distributing system for'the air product.

The chimney proper is a metallic shell of the inner sideof the chimney; while, dia--- metrically opposite said damper, the offsetmemberfi t-issecurely attached by the bottomend thereof to the plate 46 by the rivet means; 55, said. member extending; thence in. an upward direction, preferably-at. the-same angle: asth'at of the chimney-front 454i) and terminating at the top of the chinmeyshell.

.Now, as said chimney top is-'- oblong-the-oblong fitting 56 is provided as a. finial-, said the.- downward1y=extending= fitting havmg flanges 57 adapted to fit said. top and which may be hammered back to the internal tape'r of the chimney-top to lock said fitting .se-- curely in place, and having anupwardly disposed. fiange'figlada'ptedto accommodate theterra-cotta pipe 59 when socketed therein. Above said flange, resting with its bottom. member 60 on the top of the. former, is. the casing flange 61.

The member 60 is disposed in 1a. suitable well approximately located i-na ceiling depends on the well timbers, when thus installed said member 61 forms an appropriate support for a ventilating casing which may-ex.- tend upward for any required distance, and will pass rigid underwriter inspection The manifold may be providedwith either one or a plurality of distributing conduits'as 64, 65 and 66 which may in turnrbe provided with the usual register outlets, 67. Said.

manifold is provided with the foldedgroove- 68 extending all round it. and'adaptedto fitclosely down on the top ends of all the-associated plates.

At 69-69 is shown a grid-work disposed in front of the registers 7070' which are pivtherefrom. by the rim 62 supported.-

see

otedv at 71 and adapted to swing in the-direc- 'tion indicated. by the dotted lines associated therewith in Fig. 2.

The handles '72 and 73 show conventional means of adjustment of the damper 50 and the register elements 70. It believed'that" from the foregoing it be clear we prefer to manufacture our apparatus two separate units that maybe readily assembled in the following manners-.-

' The-"mantel firebox element set up in.

place on the brickwork foundation. 2.; next,

plastic asbestos cement is filledv into allj'oints such as the trough element 43, the .fold 31 and other parts and places where air would be liable to leak. The chimney element is next put in place seein that all the various joints agree. Then the olt-s 48 of which one only is illustrated are inserted and put through their registering holes in the element 43 thus binding the chimney unit to the mantel fire-box unit. Next' the mantel-shelf 47 is put on by means of the bolts 47. Nothingremains to be done now but set the manifold 63' in posi.

tion and connect the various conduits.

It is believed that the construction, operation and advantages of the invention will now be clearly understood. The present embodiments of the invention have been disclosed in detail merely by way of example, since in actual practice they attain the features of ad vantage set forth as being desirable in the statement of the invention and the above de-- scription.

Numerous changes in the details of construction, and in the combination and arrangement of parts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

Having thus described our nvention, what we claim as new is 1. -A heater unit for fire places adapted for insertion in the lower portion of the chimney cavity between the mantel and the back wall of said cavity, said unit consisting of an oblong, upstanding casing comprising closed end and back walls,'closed base plate and open" top and front, a fire box located inside said casing, an air chamber belowsaid fire box, air conduits at the ends of said casing, and a 'series of air flues at the back of-the fire box in communication with the bottom air chamber, and an air chamber at the front of said casing in communication with the bottom, rear and end aircirculating systems.

2. A heating unit according to claim 1, in

which the front and rear walls of the fire box are bent to form a contracted flue, of zigzag I shape, communicating with a chimneyvfiue.

3. A heating unit adapted to be constructed in complete form for insertion in'a fire place, and comprising the elements recited in claiml, the frontwall-of said unit, and the front wall of the fire box being formed with coincident openings for access to the fire space, and provided with a vertically sliding door located between the two walls.

A heating unitadapted to be constructed m complete form for insertion as'a whole,'.

into a fire place' consisting of a main casing,

comprising end walls, a backwall, and a front wall, and vertical partitions producing a fire box, separated-at the ends and sides. from the main casing and providing separate air flues at the ends, rear and front walls of the casing, with an air space below the, floor of the fire box having openings in its walls for the ad-' mission of fresh air from the end flues, said lower air space being in communication leading upwardly from the rear of the casing, back of the fire box to the distributing fiues.

5. A heater of the character described, and

specifically claimed in claim 1, in combination with a superposed chimney unit, constructed with a hot air flue'section in the rear of its back wall communicating with a similar flue back-of the fire box of the lower unit.

6. A heater of the character described,-

comprising a unit adapted to be inserted in a fire placeencased by a mantel, and consist-' ing essentially of a fire box, an enclosing casing and partitioned vertical flue and a superposed vertically independent chimney unit communicating with the fire space of the lower unit and constructed and adapted to com- 

